<?php

/**
* prints the form so an anonymous user can fill out the feedback on the mainsite
*
* @author Andreas Grabs
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
* @package feedback
*/

require_once("../../config.php");
require_once("lib.php");

feedback_init_feedback_session();

$id = required_param('id', PARAM_INT);
$completedid = optional_param('completedid', false, PARAM_INT);
$preservevalues  = optional_param('preservevalues', 0,  PARAM_INT);
$courseid = optional_param('courseid', false, PARAM_INT);
$gopage = optional_param('gopage', -1, PARAM_INT);
$lastpage = optional_param('lastpage', false, PARAM_INT);
$startitempos = optional_param('startitempos', 0, PARAM_INT);
$lastitempos = optional_param('lastitempos', 0, PARAM_INT);

$url = new moodle_url('/mod/feedback/complete_guest.php', array('id'=>$id));
if ($completedid !== false) {
    $url->param('completedid', $completedid);
}
if ($preservevalues !== 0) {
    $url->param('preservevalues', $preservevalues);
}
if ($courseid !== false) {
    $url->param('courseid', $courseid);
}
if ($gopage !== -1) {
    $url->param('gopage', $gopage);
}
if ($lastpage !== false) {
    $url->param('lastpage', $lastpage);
}
if ($startitempos !== 0) {
    $url->param('startitempos', $startitempos);
}
if ($lastitempos !== 0) {
    $url->param('lastitempos', $lastitempos);
}
$PAGE->set_url($url);

$highlightrequired = false;

if(($formdata = data_submitted()) AND !confirm_sesskey()) {
    print_error('invalidsesskey');
}

//if the use hit enter into a textfield so the form should not submit
if(isset($formdata->sesskey) AND !isset($formdata->savevalues) AND !isset($formdata->gonextpage) AND !isset($formdata->gopreviouspage)) {
    $gopage = $formdata->lastpage;
}
if(isset($formdata->savevalues)) {
    $savevalues = true;
}else {
    $savevalues = false;
}

if($gopage < 0 AND !$savevalues) {
    if(isset($formdata->gonextpage)){
        $gopage = $lastpage + 1;
        $gonextpage = true;
        $gopreviouspage = false;
    }else if(isset($formdata->gopreviouspage)){
        $gopage = $lastpage - 1;
        $gonextpage = false;
        $gopreviouspage = true;
    }else {
        print_error('parameters_missing', 'feedback');
    }
}else {
    $gonextpage = $gopreviouspage = false;
}


if ($id) {
    if (! $cm = get_coursemodule_from_id('feedback', $id)) {
        print_error('invalidcoursemodule');
    }

    if (! $course = $DB->get_record("course", array("id"=>$cm->course))) {
        print_error('coursemisconf');
    }

    if (! $feedback = $DB->get_record("feedback", array("id"=>$cm->instance))) {
        print_error('invalidcoursemodule');
    }
}

$capabilities = feedback_load_capabilities($cm->id);

//check whether the feedback is anonymous
if($feedback->anonymous == FEEDBACK_ANONYMOUS_YES) {
    $capabilities->complete = true;
}else {
    print_error('feedback_is_not_for_anonymous', 'feedback');
}

//check whether the user has a session
// there used to be a sesskey test - this could not work - sorry

//check whether the feedback is located and! started from the mainsite
if($course->id == SITEID AND !$courseid) {
    $courseid = SITEID;
}

require_course_login($course);

if($courseid AND $courseid != SITEID) {
    $course2 = $DB->get_record('course', array('id'=>$courseid));
    require_course_login($course2); //this overwrites the object $course :-(
    $course = $DB->get_record("course", array("id"=>$cm->course)); // the workaround
}

if(!$capabilities->complete) {
    print_error('error');
}


/// Print the page header
$strfeedbacks = get_string("modulenameplural", "feedback");
$strfeedback  = get_string("modulename", "feedback");

$PAGE->navbar->add($strfeedbacks, new moodle_url('/mod/feedback/index.php', array('id'=>$course->id)));
$PAGE->navbar->add(format_string($feedback->name));

$PAGE->set_title(format_string($feedback->name));
echo $OUTPUT->header();

//ishidden check. hidden feedbacks except feedbacks on mainsite are only accessible with related capabilities
if ((empty($cm->visible) and !$capabilities->viewhiddenactivities) AND $course->id != SITEID) {
    notice(get_string("activityiscurrentlyhidden"));
}

feedback_print_errors();

//check, if the feedback is open (timeopen, timeclose)
$checktime = time();
if(($feedback->timeopen > $checktime) OR ($feedback->timeclose < $checktime AND $feedback->timeclose > 0)) {
    echo $OUTPUT->box_start('generalbox boxaligncenter');
        echo '<h2><font color="red">'.get_string('feedback_is_not_open', 'feedback').'</font></h2>';
        echo $OUTPUT->continue_button($CFG->wwwroot.'/course/view.php?id='.$course->id);
    echo $OUTPUT->box_end();
    echo $OUTPUT->footer();
    exit;
}

//additional check for multiple-submit (prevent browsers back-button). the main-check is in view.php
$feedback_can_submit = true;
if($feedback->multiple_submit == 0 ) {
    // if($multiple_count = $DB->get_record('feedback_tracking', array('userid'=>$USER->id, 'feedback'=>$feedback->id))) {
    if(feedback_is_already_submitted($feedback->id, $courseid)) {
        $feedback_can_submit = false;
    }
}
if($feedback_can_submit) {
    //preserving the items
    if($preservevalues == 1){
        if (!$SESSION->feedback->is_started == true) {
            print_error('error', 'error', $CFG->wwwroot.'/course/view.php?id='.$course->id);
        }
        //check, if all required items have a value
        if(feedback_check_values($_POST, $startitempos, $lastitempos)) {
            $userid = $USER->id; //arb
            if($completedid = feedback_save_guest_values($_POST, sesskey())){
                add_to_log($course->id, 'feedback', 'startcomplete', 'view.php?id='.$cm->id, $feedback->id); //arb: log even guest submissions or at least the startcomplete since the other add log event is elsewhere

                if(!$gonextpage AND !$gopreviouspage) $preservevalues = false;//es kann gespeichert werden

            }else {
                $savereturn = 'failed';
                if(isset($lastpage)) {
                    $gopage = $lastpage;
                }else {
                    print_error('parameters_missing', 'feedback');
                }
            }
        }else {
            $savereturn = 'missing';
            $highlightrequired = true;
            if(isset($lastpage)) {
                $gopage = $lastpage;
            }else {
                print_error('parameters_missing', 'feedback');
            }
        }
    }

    //saving the items
    if($savevalues AND !$preservevalues){
        //exists there any pagebreak, so there are values in the feedback_valuetmp
        $userid = $USER->id; //arb changed from 0 to $USER->id - no strict anonymous feedbacks - if it is a guest taking it then I want to know that it was a guest (at least in the data saved in the feedback tables)

        $feedbackcompletedtmp = $DB->get_record('feedback_completedtmp', array('id'=>$completedid));

        //fake saving for switchrole
        $is_switchrole = feedback_check_is_switchrole();
        if($is_switchrole) {
            $savereturn = 'saved';
            feedback_delete_completedtmp($completedid);
        }else if($new_completed_id = feedback_save_tmp_values($feedbackcompletedtmp, false, $userid)) {
            $savereturn = 'saved';
            feedback_send_email_anonym($cm, $feedback, $course, $userid);
            unset($SESSION->feedback->is_started);

        }else {
            $savereturn = 'failed';
        }
    }


    if($allbreaks = feedback_get_all_break_positions($feedback->id)){
        if($gopage <= 0) {
            $startposition = 0;
        }else {
            $startposition = $allbreaks[$gopage - 1];
        }
        $ispagebreak = true;
    }else {
        $startposition = 0;
        $newpage = 0;
        $ispagebreak = false;
    }

    //get the feedbackitems after the last shown pagebreak
    $feedbackitems = $DB->get_records_select('feedback_item', 'feedback = ? AND position > ?', array($feedback->id, $startposition), 'position');
    //get the first pagebreak
    if($pagebreaks = $DB->get_records('feedback_item', array('feedback'=>$feedback->id, 'typ'=>'pagebreak'), 'position')) {
        $pagebreaks = array_values($pagebreaks);
        $firstpagebreak = $pagebreaks[0];
    }else {
        $firstpagebreak = false;
    }
    $maxitemcount = $DB->count_records('feedback_item', array('feedback'=>$feedback->id));
    $feedbackcompletedtmp = feedback_get_current_completed($feedback->id, true, $courseid, sesskey());

    /// Print the main part of the page
    ///////////////////////////////////////////////////////////////////////////
    ///////////////////////////////////////////////////////////////////////////
    ///////////////////////////////////////////////////////////////////////////
    echo $OUTPUT->heading(format_text($feedback->name));

    if( (intval($feedback->publish_stats) == 1) AND ( $capabilities->viewanalysepage) AND !( $capabilities->viewreports) ) {
        echo '<div class="mdl-align"><a href="'.htmlspecialchars('analysis.php?id=' . $id . '&courseid='.$courseid).'">';
        echo get_string('completed_feedbacks', 'feedback').'</a>';
        echo '</div>';
    }

    if(isset($savereturn) && $savereturn == 'saved') {
        if($feedback->page_after_submit) {
            echo $OUTPUT->box_start('generalbox boxaligncenter boxwidthwide');
            echo format_text($feedback->page_after_submit);
            echo $OUTPUT->box_end();
        } else {
            echo '<p align="center"><b><font color="green">'.get_string('entries_saved','feedback').'</font></b></p>';
            if( intval($feedback->publish_stats) == 1) {
                echo '<p align="center"><a href="analysis.php?id=' . $id . '&courseid='.$courseid.'">';
                echo get_string('completed_feedbacks', 'feedback').'</a>';
                echo '</p>';
            }
        }
        if($feedback->site_after_submit) {
            echo $OUTPUT->continue_button(feedback_encode_target_url($feedback->site_after_submit));
        }else {
            if($courseid) {
                if($courseid == SITEID) {
                    echo $OUTPUT->continue_button($CFG->wwwroot);
                }else {
                    echo $OUTPUT->continue_button($CFG->wwwroot.'/course/view.php?id='.$courseid);
                }
            }else {
                if($course->id == SITEID) {
                    echo $OUTPUT->continue_button($CFG->wwwroot);
                } else {
                    echo $OUTPUT->continue_button($CFG->wwwroot.'/course/view.php?id='.$course->id);
                }
            }
        }
    }else {
        if(isset($savereturn) && $savereturn == 'failed') {
            echo '<p align="center"><b><font color="red">'.get_string('saving_failed','feedback').'</font></b></p>';
        }

        if(isset($savereturn) && $savereturn == 'missing') {
            echo '<p align="center"><b><font color="red">'.get_string('saving_failed_because_missing_or_false_values','feedback').'</font></b></p>';
        }

        //print the items
        if(is_array($feedbackitems)){
            echo $OUTPUT->box_start('generalbox boxaligncenter boxwidthwide');
            echo '<div class="mdl-align"><form name="frm" action="complete_guests.php" method="post" onsubmit=" ">';
            echo '<table>';
            echo '<tr><td colspan="3" align="center">
                    <input type="hidden" name="anonymous" value="0" />
                    <input type="hidden" name="anonymous_response" value="'.FEEDBACK_ANONYMOUS_YES.'" />
                    <input type="hidden" name="sesskey" value="'.sesskey().'" />
                    &nbsp;
                  </td></tr>';
            //check, if there exists required-elements
            $countreq = $DB->count_records('feedback_item', array('feedback'=>$feedback->id, 'required'=>1));
            if($countreq > 0) {
                echo '<tr><td colspan="3"><font color="red">(*)' . get_string('items_are_required', 'feedback') . '</font></td></tr>';
            }

            unset($startitem);
            $itemnr = $DB->count_records_select('feedback_item', 'feedback = ? AND hasvalue = 1 AND position < ?', array($feedback->id, $startposition));
            foreach($feedbackitems as $feedbackitem){
                if(!isset($startitem)) {
                    //avoid showing double pagebreaks
                    if($feedbackitem->typ == 'pagebreak') continue;
                    $startitem = $feedbackitem;
                }
                $value = '';
                //get the value
                $frmvaluename = $feedbackitem->typ . '_'. $feedbackitem->id;
                if(isset($savereturn)) {
                    $value =  isset($formdata->{$frmvaluename})?$formdata->{$frmvaluename}:NULL;
                }else {
                    if(isset($feedbackcompletedtmp->id)) {
                        $value = feedback_get_item_value($feedbackcompletedtmp->id, $feedbackitem->id, sesskey());
                    }
                }
                echo '<tr>';
                if($feedbackitem->hasvalue == 1 AND $feedback->autonumbering) {
                    $itemnr++;
                    echo '<td valign="top">' . $itemnr . '.&nbsp;</td>';
                } else {
                    echo '<td>&nbsp;</td>';
                }
                if($feedbackitem->typ != 'pagebreak') {
                    feedback_print_item($feedbackitem, $value, false, false, $highlightrequired);
                }
                echo '</tr>';
                echo '<tr><td>&nbsp;</td></tr>';

                $lastbreakposition = $feedbackitem->position; //last item-pos (item or pagebreak)
                if($feedbackitem->typ == 'pagebreak'){
                    break;
                }else {
                    $lastitem = $feedbackitem;
                }
            }
            echo '</table>';
            echo '<input type="hidden" name="id" value="'.$id.'" />';
            echo '<input type="hidden" name="feedbackid" value="'.$feedback->id.'" />';
            echo '<input type="hidden" name="lastpage" value="'.$gopage.'" />';
            echo '<input type="hidden" name="completedid" value="'.(isset($feedbackcompletedtmp->id)?$feedbackcompletedtmp->id:'').'" />';
            echo '<input type="hidden" name="courseid" value="'. $courseid . '" />';
            echo '<input type="hidden" name="preservevalues" value="1" />';
            if(isset($startitem)) {
                echo '<input type="hidden" name="startitempos" value="'. $startitem->position . '" />';
                echo '<input type="hidden" name="lastitempos" value="'. $lastitem->position . '" />';
            }

            if($ispagebreak AND $lastbreakposition > $firstpagebreak->position) {
                echo '<input name="gopreviouspage" type="submit" value="'.get_string('previous_page','feedback').'" />';
            }
            if($lastbreakposition < $maxitemcount){
                echo '<input name="gonextpage" type="submit" value="'.get_string('next_page','feedback').'" />';
            }
            if($lastbreakposition >= $maxitemcount) { //last page
                echo '<input name="savevalues" type="submit" value="'.get_string('save_entries','feedback').'" />';
            }

            echo '</form>';

            if($courseid) {
                echo '<form name="frm" action="'.$CFG->wwwroot.'/course/view.php?id='.$courseid.'" method="post" onsubmit=" ">';
            }else{
                if($course->id == SITEID) {
                    echo '<form name="frm" action="'.$CFG->wwwroot.'" method="post" onsubmit=" ">';
                } else {
                    echo '<form name="frm" action="'.$CFG->wwwroot.'/course/view.php?id='.$course->id.'" method="post" onsubmit=" ">';
                }
            }
            echo '<input type="hidden" name="sesskey" value="'.sesskey().'" />';
            echo '<input type="hidden" name="courseid" value="'. $courseid . '" />';
            echo '<button type="submit">'.get_string('cancel').'</button>';
            echo '</form>';
            echo '</div>';
            $SESSION->feedback->is_started = true;
            echo $OUTPUT->box_end();
        }
    }
}else {
    echo $OUTPUT->box_start('generalbox boxaligncenter');
        echo '<h2><font color="red">'.get_string('this_feedback_is_already_submitted', 'feedback').'</font></h2>';
        echo $OUTPUT->continue_button($CFG->wwwroot.'/course/view.php?id='.$course->id);
    echo $OUTPUT->box_end();
}
/// Finish the page
///////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////

echo $OUTPUT->footer();

